1203113213123 has 4 divisors (see below), whose sum is σ = 1211080850448. Its totient is φ = 1195145575800.

The previous prime is 1203113213077. The next prime is 1203113213129. The reversal of 1203113213123 is 3213123113021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1203113213123 - 2²⁴ = 1203096435907 is a prime.

It is a super-2 number, since 2×1203113213123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203113213129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3983818436 + ... + 3983818737.

It is an arithmetic number, because the mean of its divisors is an integer number (302770212612).

Almost surely, 2^{1203113213123} is an apocalyptic number.

1203113213123 is a deficient number, since it is larger than the sum of its proper divisors (7967637325).

1203113213123 is an equidigital number, since it uses as much as digits as its factorization.

1203113213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7967637324.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1203113213123 its reverse (3213123113021), we get a palindrome (4416236326144).

The spelling of 1203113213123 in words is "one trillion, two hundred three billion, one hundred thirteen million, two hundred thirteen thousand, one hundred twenty-three".